function validateForm(form)
{
	
		var str = form.email.value;
		var re = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	
		if (form.email.value == "") 
		{
			alert("Please enter Your email.");
			form.email.focus();
			return false;
		}
	
		if (!re.test(str)) 
		{
			alert("Please enter a valid email address for Your Email.");
			form.email.focus();
			return false;
		}
		
		
		if (form.weight.value == "") 
		{
			alert("Please enter your weight.");
			form.weight.focus();
			return false;
		}
		if (isNaN(form.weight.value)) 
		{
			alert("Please enter a number for weight.");
			form.weight.focus();
			return false;
		}

}