function Acceptnumber(sender){
	if(window.event){
    	key = window.event.keyCode;
        if(key == 13){
        	document.contentform.submit();
	    }
    	if (!((key > 47) && (key < 58))){
        	window.event.keyCode=0;
        }
    }else{
      sender.value=sender.value.replace(/[^0-9]/,"");
    }
}