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To Validate Numbers Using JavaScript

Posted By:Prasanti Prusty       Posted Date: December 17, 2009    Points: 10    Category: Javascript    URL: http://www.dotnetspark.com  
 

To Validate Numbers Using JavaScript you can use below function. This function can be used to validate numeric value. This function also alert user if user entered wrong value.

function Validatenumber(obj)
{
	if (obj.length !=0)
	{
		var text = /^[-0-9]+$/;

		if ((document.getElementById(obj.id).value != "") && (!text.test(document.getElementById(obj.id).value)))
		{
			alert("Please enter numeric values only");
			obj.focus();
			obj.select();
		}
	}
}


     

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