Регулярки в Javascript. Кто работал?

<script>

	function LexicAn()

	{ 

		var prixod=document.forms.elements.value;

		//document.getElementById('text').innerHTML=prixod.bold(); 



//document.forms.elements.value="";	 

		/*var reg=/a-q/g;

		var arr=reg.exec(prixod);

		alert(prixod+"  "+arr);

		for(var i=0;i<arr.length; i++)

		{

			document.getElementById('text').innerHTML=arr;

		}*/

		/*var str = "Miss$$issippi";  

		var pattern = /is./g;

		var result = str.match(pattern);

		if(result)

		{

			for(i = 0; i < result.length; i++) 

			{



alert("Sootvettstvie # " + (i+1) + ": " + result+" position "+result.index);



//document.getElementById('text').innerHTML+="Match #" + (i+1) + ": " + result+" number of match "+result.index+"<br />";

			}

		}

		else {document.getElementById('text').innerHTML="No matches!"}*/



var place = "Mississippi"; 

		var obj = /is./g; 

		 result = obj.exec(place); 

		 alert(result+" "+result.index );

		//while((result =  obj.exec(place)) != null) {     alert("Found " + result + " at " +         result.index); 	

	}

</script>

<script type="text/javascript">

var str = "Miss$$issippi"; 

var pattern = /is./g;

var matches = str.match(pattern);

var split = str.split(pattern);

var position = 0;

var positions = new Array();


for (var i = 0; i < matches.length; i++ ) {

	position += split.length;

	positions = position;

	position += matches.length;

}


alert(positions);

alert(positions.length);

</script>