function checkNo(theform){

	var val = eval('document.' + theform + '.' + document.activeElement.id + '.value;');

	

	newVal = "";

	

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

		if(! isNaN(val.charAt(i)) || val.charAt(i) == "."){				

			newVal += val.charAt(i);

		}

	}

	

	eval('document.' + theform + '.' + document.activeElement.id + '.value="'+newVal+'";');

}