function check_form()
				{
				if(form1.name.value=="")
					{
					alert("Name is a compulsory field");
					form1.name.focus();
					return false;
					}
			
				if(!document.getElementById("email").value){
	alert('Please enter your email');
	document.getElementById("email").focus();
	return false;
	}else 
	   {    var emailStr=document.form1.email.value;   
			var reg1 = /(@.*@)|(\.\.)|(@\.)|(\.@)|(^\.)/; // not valid
			var reg2 = /^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,3}|[0-9]{1,3})(\]?)$/; // valid
			if (!(!reg1.test(emailStr) && reg2.test(emailStr))) 
			{
			 alert("Please check your email address.");
			 form1.email.focus();
			  return false; 
			
			  }				
	
	  }	
				}