// JavaScript Document
   function ValidateForm(f){

      with(f){
			if (isEmpty(_10_Name.value)) {
				alert("Please enter your Name");
				_10_Name.focus();
				return false;
			}
			
			if (isEmpty(_15_Email_From.value)) {
				alert("Please enter your Email Address");
				_15_Email_From.focus();
				return false;
			}
			
			if ( !isEmail(_15_Email_From.value) ) {
				alert("Please enter a valid Email Address.");
				_15_Email_From.focus();
				return false;
			}
						
			if (isEmpty(_25_How_did_you_hear_about_us.value)) {
				alert("Please select How did you hear about us?");
				_25_How_did_you_hear_about_us.focus();
				return false;
			}			
			
			if (isEmpty(_30_Enquiry.value)) {
				alert("Please enter your query in the enquiry field");
				_30_Enquiry.focus();
				return false;
			}
       
   	}
   return true;
 }