function validation ()
{
	function is_numeric(value)
	{
		var numaric = value;
		for(var j=0; j<numaric.length; j++)
		{
			var value = numaric.charAt(j);
			var hh = value.charCodeAt(0);
			if(hh > 47 && hh<58)
			{
			}
			else
			{
				return false;
			}
		}
		 return true;
	}
		
	if(document.frmContactUS.txtName.value == "")
	{
		alert("Please enter your name");
		document.frmContactUS.txtName.focus();
		return false;
	}

	if(document.frmContactUS.txtAddress.value == "")
	{
		alert("Please enter your address");
		document.frmContactUS.txtAddress.focus();
		return false;
	}
	if(document.frmContactUS.txtZip.value == "")
	{
		alert("Please enter your zip");
		document.frmContactUS.txtZip.focus();
		return false;
	}
/*	else if (isNaN(document.frmContactUS.txtZip.value))
	{
		alert("Please enter valid zip,zip code should be numeric");
		document.frmContactUS.txtZip.focus();
		return false;
	}	*/
	if((document.frmContactUS.txtPhone.value == ""))
	{
		alert("Please enter your phone number");
		document.frmContactUS.txtPhone.focus();
		return false;	
	}
	/*else
	{
		if (/^\(?(\d{3})\)?[- ]?(\d{3})[- ]?(\d{4})$/.test(document.frmContactUS.txtPhone.value))
		{
			
		}
		else
		{
			alert("Please enter valid phone number");
			document.frmContactUS.txtPhone.focus();	
			return false;
		}
	}*/
	/*else
	{
		if(is_numeric(document.frmContactUS.txtPhone.value)==false)
		{
		alert("Please enter valid phone number,phone number should be numeric");
		document.frmContactUS.txtPhone.focus();
		return false;
		}
	}	*/
	if((document.frmContactUS.txtEmail.value == "") || (document.frmContactUS.txtEmail.value == "enter email id here"))
	{
		alert("Please enter your email address");		
		document.frmContactUS.txtEmail.focus();	
		return false;
	}
	else
	{
		if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(document.frmContactUS.txtEmail.value))
		{
			
		}
		else
		{
			alert("Enter valid email address")
			document.frmContactUS.txtEmail.focus();	
			return (false);
		}
	}	
	if(document.frmContactUS.txtComment.value == "")
	{
		alert("Please enter your comment");
		document.frmContactUS.txtComment.focus();
		return false;
	}
}