function check(){
	//	isnull validations
	for (i=0;i<9;i++)
		{
		sn=document.fback.elements[i].value;
		if (sn == "")
			{
			alert(document.fback.elements[i].name +" field is mandatory");
			document.fback.elements[i].focus();
			return false;
			}
		}
	//	isnull validations end
	
	//	zipcode validations
	
		if (document.fback.zip.value  != "")
			{
				returnvalue = isnumber(document.fback.zip);
				if(returnvalue == false)
				{
					alert("In " +document.fback.zip.name +" characters are not allowed");
					document.fback.zip.focus();
					return false;
				}
			}
	//	zipcode validations end
	
	//	phone validations
		if (document.fback.phone.value != "")
			{
				//var x1=/^[0-9][0-9_0-9]+\-[0-9]+\-[0-9]+\-[0-9]+$/i
				
				var x1 = /^[0-9]|-+$/i
			//	var x1 = /^[0-9]|-+$/i
				if (!isValid(x1,fback.phone.value))
					{	
					alert("Invalid Phone Number");
					fback.phone.focus()
					return false;
					}
			}
	//	phone validation ends
	
	//	email validation
	
		if(document.fback.email.value != "")
			{
				var x=/^[a-z][a-z_0-9]+@[a-z_0-9\.\-]+\.[a-z]+$/i
				if (!isValid(x,fback.email.value))
				{
				alert("Invalid E-mail Address");
				fback.email.focus()
				return false;
				}
			}
					
		if(document.fback.email.value == "")
			{
			alert("E-mail Address is mandatory");
			document.fback.email.focus();
			return false;
			}	
	//	email validations end
}
							
	function isValid(pattern, str)
		{
		return pattern.test(str)
		}