text select in textarea (regular expression)

[Volt]

is there any way to select and mark part of text in textarea by regular
expression?

i need to select the first string in textarea whitch is like xxxxx,xxx

where x is any character

[Yep]

Re: text select in textarea (regular expression)

"Volt" wrote :
[color=blue]
> i need to select the first string in textarea whitch is like xxxxx,xxx[/color]

You can use ranges to retrieve and highlight text, but few browsers
support them, namely IE4+ and recent Gecko-based browsers; the
following should work on IE5.5+ and Mozilla; if you need to support
older IE then you'll have to emulate $x properties on RegExp.


---
<form>
<textarea rows="5" cols="60">
Here's a matched sequence : 12345,123
</textarea>
<input type="button"
value="match()"
onclick="match( '\\d{5},\\d{3}' , this.form.eleme nts[0])">
</form>

<script type="text/javascript">
function match(pattern, textarea){

function makeMatcher(fun c){
return function(re, ta) {
return !!
new RegExp(re).exec (ta.value) &&
func(ta, RegExp["$`"].length, RegExp["$&"].length);
}
}

function moz_match(texta rea, start, length){
var v=textarea.valu e;
textarea.setSel ectionRange(sta rt, start+length);
textarea.scroll Top=textarea.sc rollHeight*
((v.substr(0, start).replace(/[^\n]/g, "").length-1)/
((v.replace(/[^\n]/g, "")).length))|0 ;
return true;
}

function ie_match(textar ea, start, length){
var rng, corr=textarea.v alue.substr(0, start).
replace(/[^\r]|\r[^\n]/g,"").length;
rng=textarea.cr eateTextRange() ;
rng.moveStart(" character", start-corr);
rng.collapse(tr ue);
rng.moveEnd("ch aracter", length);
rng.select();
return true;
}

function dummy(){
return false;
}

match=textarea. setSelectionRan ge && makeMatcher(moz _match) ||
textarea.create TextRange && makeMatcher(ie_ match) ||
dummy;

return match(pattern, textarea);
}
</script>
---


HTH
Yep.