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Question about Javascript Regular Expression

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  #1  
Old November 12th, 2005, 03:25 PM
stefos stefos is offline
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Question about Javascript Regular Expression
Hello,

I want to write a Javascript Regular Expression in my form validation, which make some replacement like:

Code:
var objRegExp = /^(MP)/gi; // start of string
var strSURNAME = document.form1.x_SURNAME.value;
var strReverseName = strSURNAME.replace(objRegExp, "B");
document.form1.x_SURNAME.value = strReverseName;

var objRegExp = /(MP)$/gi; // end of string
var strSURNAME = document.form1.x_SURNAME.value;
var strReverseName = strSURNAME.replace(objRegExp, "B");
document.form1.x_SURNAME.value = strReverseName;


For example:
string MPAMPAKAS translates to BAMPAKAS (correct)
or string MPAMP traslates to BAB (also correct),
but if i type: MPAMPAKAS MPAMPAKAS
translates to BAMPAKAS MPAMPAKAS
instead of BAMPAKAS BAMPAKAS (correct)

Does anyone knows how to wrote the correct one?

Thanks in advance for your help!
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  #2  
Old November 12th, 2005, 04:52 PM
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honcho honcho is offline
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RE: Question about Javascript Regular Expression
From your examples, it looks like you want to use word-boundaries and not "start of string" and "end of string." Try /b(MP)/gi and /(MP)b/gi as your regexs instead.
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  #3  
Old November 12th, 2005, 05:18 PM
stefos stefos is offline
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RE: Question about Javascript Regular Expression
Finally Worked
Thank you very much honcho.
I was trying to figure out the translation from Greek to English using Greek ELOT 743 standard and now my function is working ok, but the code is rather big enough.

Is it possible to use some kind of an array or global function to shrink the code and call it only in desired inputs?

Full code:
Code:
<script language=Javascript>
<!--
var oldtext;

function convertchar(inp_char)
{
if (inp_char=="α") {return "A"}
else if (inp_char=="n") {return "n"}
else if (inp_char=="ά") {return "A"}
else if (inp_char=="Α") {return "A"}
else if (inp_char=="Ά") {return "A"}
else if (inp_char=="β") {return "V"}
else if (inp_char=="Β") {return "V"}
else if (inp_char=="γ") {return "G"}
else if (inp_char=="Γ") {return "G"}
else if (inp_char=="δ") {return "D"}
else if (inp_char=="Δ") {return "D"}
else if (inp_char=="ε") {return "E"}
else if (inp_char=="έ") {return "E"}
else if (inp_char=="Ε") {return "E"}
else if (inp_char=="Έ") {return "E"}
else if (inp_char=="ζ") {return "Z"}
else if (inp_char=="Ζ") {return "Z"}
else if (inp_char=="η") {return "I"}
else if (inp_char=="ή") {return "I"}
else if (inp_char=="Η") {return "I"}
else if (inp_char=="Ή") {return "I"}
else if (inp_char=="θ") {return "TH"}
else if (inp_char=="Θ") {return "TH"}
else if (inp_char=="ι") {return "I"}
else if (inp_char=="ί") {return "I"}
else if (inp_char=="ϊ") {return "I"}
else if (inp_char=="ΐ") {return "I"}
else if (inp_char=="Ι") {return "I"}
else if (inp_char=="Ί") {return "I"}
else if (inp_char=="Ϊ") {return "I"}
else if (inp_char=="κ") {return "K"}
else if (inp_char=="Κ") {return "K"}
else if (inp_char=="λ") {return "L"}
else if (inp_char=="Λ") {return "L"}
else if (inp_char=="μ") {return "M"}
else if (inp_char=="Μ") {return "M"}
else if (inp_char=="ν") {return "N"}
else if (inp_char=="Ν") {return "N"}
else if (inp_char=="ξ") {return "X"}
else if (inp_char=="Ξ") {return "X"}
else if (inp_char=="ο") {return "O"}
else if (inp_char=="ό") {return "O"}
else if (inp_char=="Ο") {return "O"}
else if (inp_char=="Ό") {return "O"}
else if (inp_char=="π") {return "P"}
else if (inp_char=="Π") {return "P"}
else if (inp_char=="ρ") {return "R"}
else if (inp_char=="Ρ") {return "R"}
else if (inp_char=="σ") {return "S"}
else if (inp_char=="ς") {return "S"}
else if (inp_char=="Σ") {return "S"}
else if (inp_char=="τ") {return "T"}
else if (inp_char=="Τ") {return "T"}
else if (inp_char=="υ") {return "Y"}
else if (inp_char=="ύ") {return "Y"}
else if (inp_char=="ϋ") {return "Y"}
else if (inp_char=="ΰ") {return "Y"}
else if (inp_char=="Υ") {return "Y"}
else if (inp_char=="Ύ") {return "Y"}
else if (inp_char=="Ϋ") {return "Y"}
else if (inp_char=="φ") {return "F"}
else if (inp_char=="Φ") {return "F"}
else if (inp_char=="χ") {return "CH"}
else if (inp_char=="Χ") {return "CH"}
else if (inp_char=="ψ") {return "PS"}
else if (inp_char=="Ψ") {return "PS"}
else if (inp_char=="ω") {return "O"}
else if (inp_char=="ώ") {return "O"}
else if (inp_char=="Ω") {return "O"}
else if (inp_char=="Ώ") {return "O"}
else if (inp_char=="n") {return ""}
else return inp_char
}


function translate()
	    {
		document.form1.x_SURNAME.value="";
		for (i=0;i<document.form1.x_EPONYMO.value.length;i++)
		    (
				document.form1.x_SURNAME.value += convertchar(document.form1.x_EPONYMO.value.charAt(  i))
		    )
		oldtext=document.form1.x_EPONYMO.value;

        var objRegExp = /(AI)/g;
		var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "AI");
 		document.form1.x_SURNAME.value = strReverseName;

        var objRegExp = /(OI)/g;
		var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "OI");
		document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(EI)/g;
		var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "EI");
		document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(OY)/g;
		var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "OU");
		document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(AY)$/g; 
		var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "AF");
		document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(EY)$/g; 
		var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "EF");
		document.form1.x_SURNAME.value = strReverseName;

        var objRegExp = /(AY)?(YT)/g;
		var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "FT");
		document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(AY)?(YK)/g;
		var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "FK");
		document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(AY)?(YX)/g;
		var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "FX");
	    document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(AY)?(YP)/g;
		var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "FP");
	    document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(AY)?(YS)/g;
		var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "FS");
	    document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(AY)?(YF)/g;
		var strSURNAME = document.form1.x_SURNAME.value;
	    var strReverseName = strSURNAME.replace(objRegExp, "FF");
	    document.form1.x_SURNAME.value = strReverseName;

        var objRegExp = /(AY)?(YC)/g;
		var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "FC");
	    document.form1.x_SURNAME.value = strReverseName;

        var objRegExp = /(AY)?(YV)/g;
	    var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "VV");
		document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(AY)?(YG)/g;
	    var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "VG");
		document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(AY)?(YD)/g;
	    var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "VD");
		document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(AY)?(YZ)/g;
	    var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "VZ");
		document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(AY)?(YL)/g;
	    var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "VL");
		document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(AY)?(YM)/g;
	    var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "VM");
		document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(AY)?(YN)/g;
	    var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "VN");
		document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(AY)?(YR)/g;
	    var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "VR");
		document.form1.x_SURNAME.value = strReverseName;

        var objRegExp = /(AY)?(YA)/g;
	    var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "VA");
		document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(AY)?(YE)/g;
	    var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "VE");
		document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(AY)?(YI)/g;
	    var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "VI");
		document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(AY)?(YO)/g;
	    var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "VO");
		document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(AY)?(YY)/g;
	    var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "VY");
		document.form1.x_SURNAME.value = strReverseName;

        var objRegExp = /^(IY)?(YV)/g;
  	    var strSURNAME = document.form1.x_SURNAME.value;
  		var strReverseName = strSURNAME.replace(objRegExp, "IY");
  		document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(EY)?(YV)/g;
	    var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "VV");
		document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(EY)?(YG)/g;
	    var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "VG");
		document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(EY)?(YD)/g;
	    var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "VD");
		document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(EY)?(YZ)/g;
	    var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "VZ");
		document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(EY)?(YL)/g;
	    var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "VL");
		document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(EY)?(YM)/g;
	    var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "VM");
		document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(EY)?(YN)/g;
	    var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "VN");
		document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(EY)?(YR)/g;
	    var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "VR");
		document.form1.x_SURNAME.value = strReverseName;

        var objRegExp = /(EY)?(YA)/g;
	    var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "VA");
		document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(EY)?(YE)/g;
	    var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "VE");
		document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(EY)?(YI)/g;
	    var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "VI");
		document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(EY)?(YO)/g;
	    var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "VO");
		document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(EY)?(YY)/g;
	    var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "VY");
		document.form1.x_SURNAME.value = strReverseName;

        var objRegExp = /b(MP)/g; 
        var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "B");
		document.form1.x_SURNAME.value = strReverseName;
		
		var objRegExp = /(MP)b/g;
		var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "B");
		document.form1.x_SURNAME.value = strReverseName;

		var objRegExp = /(NT)/g;
		var strSURNAME = document.form1.x_SURNAME.value;
		var strReverseName = strSURNAME.replace(objRegExp, "NT");
		document.form1.x_SURNAME.value = strReverseName;

        var objRegExp = /(TS)/g;
        var strSURNAME = document.form1.x_SURNAME.value;
        var strReverseName = strSURNAME.replace(objRegExp, "TS");
        document.form1.x_SURNAME.value = strReverseName;

        var objRegExp = /(TZ)/g;
        var strSURNAME = document.form1.x_SURNAME.value;
        var strReverseName = strSURNAME.replace(objRegExp, "TZ");
        document.form1.x_SURNAME.value = strReverseName;

        var objRegExp = /(GG)/g;
        var strSURNAME = document.form1.x_SURNAME.value;
        var strReverseName = strSURNAME.replace(objRegExp, "NG");
        document.form1.x_SURNAME.value = strReverseName;

        var objRegExp = /(GK)/g;
        var strSURNAME = document.form1.x_SURNAME.value;
        var strReverseName = strSURNAME.replace(objRegExp, "GK");
        document.form1.x_SURNAME.value = strReverseName;

   		var objRegExp = /(IY)$/g; // 
  		var strSURNAME = document.form1.x_SURNAME.value;
  		var strReverseName = strSURNAME.replace(objRegExp, "IF");
  		document.form1.x_SURNAME.value = strReverseName;

        var objRegExp = /(IVV)/g;
  	    var strSURNAME = document.form1.x_SURNAME.value;
  		var strReverseName = strSURNAME.replace(objRegExp, "IYV");
  		document.form1.x_SURNAME.value = strReverseName;

        var objRegExp = /(IVG)/g;
  	    var strSURNAME = document.form1.x_SURNAME.value;
  		var strReverseName = strSURNAME.replace(objRegExp, "IYG");
  		document.form1.x_SURNAME.value = strReverseName;

        var objRegExp = /(IVD)/g;
  	    var strSURNAME = document.form1.x_SURNAME.value;
  		var strReverseName = strSURNAME.replace(objRegExp, "IYD");
  		document.form1.x_SURNAME.value = strReverseName;

        var objRegExp = /(IVZ)/g;
  	    var strSURNAME = document.form1.x_SURNAME.value;
  		var strReverseName = strSURNAME.replace(objRegExp, "IYZ");
  		document.form1.x_SURNAME.value = strReverseName;

        var objRegExp = /(IVL)/g;
  	    var strSURNAME = document.form1.x_SURNAME.value;
  		var strReverseName = strSURNAME.replace(objRegExp, "IYL");
  		document.form1.x_SURNAME.value = strReverseName;

        var objRegExp = /(IVM)/g;
  	    var strSURNAME = document.form1.x_SURNAME.value;
  		var strReverseName = strSURNAME.replace(objRegExp, "IYM");
  		document.form1.x_SURNAME.value = strReverseName;

        var objRegExp = /(IVN)/g;
  	    var strSURNAME = document.form1.x_SURNAME.value;
  		var strReverseName = strSURNAME.replace(objRegExp, "IYN");
  		document.form1.x_SURNAME.value = strReverseName;

        var objRegExp = /(IVR)/g;
  	    var strSURNAME = document.form1.x_SURNAME.value;
  		var strReverseName = strSURNAME.replace(objRegExp, "IYR");
  		document.form1.x_SURNAME.value = strReverseName;

        var objRegExp = /(IVA)/g;
  	    var strSURNAME = document.form1.x_SURNAME.value;
  		var strReverseName = strSURNAME.replace(objRegExp, "IYA");
  		document.form1.x_SURNAME.value = strReverseName;

        var objRegExp = /(IVE)/g;
  	    var strSURNAME = document.form1.x_SURNAME.value;
  		var strReverseName = strSURNAME.replace(objRegExp, "IYE");
  		document.form1.x_SURNAME.value = strReverseName;

        var objRegExp = /(IVI)/g;
  	    var strSURNAME = document.form1.x_SURNAME.value;
  		var strReverseName = strSURNAME.replace(objRegExp, "IYI");
  		document.form1.x_SURNAME.value = strReverseName;

        var objRegExp = /(IVO)/g;
  	    var strSURNAME = document.form1.x_SURNAME.value;
  		var strReverseName = strSURNAME.replace(objRegExp, "IYO");
  		document.form1.x_SURNAME.value = strReverseName;

        var objRegExp = /(IVY)/g;
  	    var strSURNAME = document.form1.x_SURNAME.value;
  		var strReverseName = strSURNAME.replace(objRegExp, "IYY");
  		document.form1.x_SURNAME.value = strReverseName;

}

-->
</SCRIPT>
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