function check(val)
{

	if(val.user.value=='')
	{
       alert('Please Enter  Name.');
		val.user.focus();
		return false;
	}
	if(val.email.value=='')
	{
       alert('Please Enter Email.');
		val.email.focus();
		return false;
	}
	
	else
	{
		emailExp= /^\w+(\-\w+)*(\.\w+(\-\w+)*)*@\w+(\-\w+)*(\.\w+(\-\w+)*)+$/;
	 	 if (!(emailExp.test(val.email.value)))
		 {
		 	alert('Please Enter Valid E-mail Address.');
			val.email.focus();
			return false;
			
		 }
 	}
	if(val.phone.value=='')
	{
       alert('Please Enter Phone.');
		val.phone.focus();
		return false;
	}
	
	else
	{
		if(isNaN(val.phone.value))
		{
		  alert('please enter numeric value of phone.');
			val.phone.focus();
			return false;
		}
	}
	if(val.zip.value=='')
	{
       alert('Please Enter Postal Code.');
		val.zip.focus();
		return false;
	}

	if(val.comment.value=='')
	{
       alert('Please Enter Comment.');
		val.comment.focus();
		return false;
	}
	 
return true;
}