Numeric Validation JavaScript

This article will be part of series I will be posting. The series will be focused around the AJAX presentation in the Web Content Publishers meeting.

In this series I will discuss share some validations function I have used to validate the grid. In addition to validating the field, notice how it maps the arrows keys to give the user a Microsoft Excel like feel.

Validating a numeric field

function NumbersOnly(Object) {	if(CurrentCellClicked) {		if((event.shiftKey && event.keyCode == 9) || event.keyCode==37) {			event.returnValue=true;			return ;		}		else if(event.keyCode==9 || event.keyCode==39) {			event.returnValue=true;			return ;		}	}	if(event.keyCode == 36 || event.keyCode == 35 || event.keyCode == 46 || event.keyCode == 8) event.returnValue=true;	else if((event.shiftKey && event.keyCode == 9) || event.keyCode==37) {		var t = parseInt(Object.nextField);		if(t > 2) {			t = GlobalForm['c'+(t-2)];			if(t.disabled) {				GlobalForm['c'+(t.nextField-2)].select();				GlobalForm['c'+(t.nextField-2)].focus();			}			else {				t.select();				t.focus();			}			event.returnValue = false;		}	}	else if(event.shiftKey) event.returnValue = false;	else if(event.keyCode==9 || event.keyCode==39) {		var t = GlobalForm['c'+Object.nextField];		if(t.disabled) {			GlobalForm['c'+t.nextField].select();			GlobalForm['c'+t.nextField].focus();		}		else {			t.select();			t.focus();		}		event.returnValue = false;	}	else {		event.returnValue = ((event.keyCode >= 48 && event.keyCode <= 57) || (event.keyCode>=96 && event.keyCode<=105));	}}