Hi Everest!!
Hope this will help you :)
<script>
function storeCaret (x) {
if (!document.all) {return}
textEl = x
if (textEl.createTextRange)
caretPos = document.selection.createRange();
}
function update (field,event,precision22) {
var isIE = document.all?true:false;
var isNS = document.layers?true:false;
var key = (isIE) ? window.event.keyCode : e.which;
var obj = (isIE) ? event.srcElement : e.target;
if ( (event.keyCode >47&& event.keyCode <58)||event.keyCode ==46)
{
var icaretPos = (caretPos) ? caretPos : textEl.length;
icaretPos.text = "|";
theValue = textEl.value;
temp_original=theValue;
var arr=theValue.split("|");
toTheLeft=arr[0].split(",")[arr[0].split(",").length-1];
toTheRight = arr[1].split(',')[0];
if(toTheLeft.indexOf(".")>=0)
{
dec_right=temp_original.indexOf(".")
dec_left=temp_original.substring(dec_right+1,temp_ original.length)
dec_left_length=dec_left.length
if(event.keyCode!=46&&dec_left_length<((precision2 2)+1))
{ event.returnValue = true;}
else
{ event.returnValue = false;}
}
if((toTheRight.indexOf(".")>=0)&&event.keyCode ==46)
{event.returnValue = false;}
caretPos.moveStart("character", -1);
caretPos.text="";
}
else
event.returnValue = false;
}
</script>
</head>
<body >
<form>
<table><tr>
<td>only2Digits after decimal<input name="txt" onkeypress="storeCaret(this);update(this,event,2)" ></td>
</tr>
<tr><td>only5Digits after decimal<input name="txt2" onkeypress="storeCaret(this);update(this,event,5)" ></td>
</tr>
</table>
</form>
<br>
</body>
</html>
_____________************_______________
It will only allow decimal(./dot) ,no other characters.
You can specfiy number of decimal digits
You can enter other number after decimal
You can't put more than one dot(.)
Please a look on the following link too
http://www.experts-exchange.com/Prog..._20739343.html
Cheers :)
vinod
reg. exp. for up to 2 decimal places
