Numeric only textbox

<script language="javascript" type="text/javascript"><!--function intOnly(i) { if(i.value.length>0) { i.value = i.value.replace(/[^\d]+/g, ''); }}//--></script>Integer Only Textbox:<br><input type="text" onChange="intOnly(this);" onKeyUp="intOnly(this);" onKeyPress="intOnly(this);">