function validate_speaker()
			{
				
				var form = document.form3;
		        var emailpat =/^[a-zA-Z0-9._-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}$/;	
			    
			 
			if (form.first_name.value == "") {
				alert( "Please enter your First Name" );
				form.first_name.focus();
				return false;
			}
			else if (form.job_title.value == "") {
				alert( "Please enter Your Job Title" );
				form.job_title.focus();
				return false;
			}
			else if (form.companyname.value == "") {
				alert( "Please enter Your Company Name" );
				form.companyname.focus();
				return false;
			}
			else if( !emailpat.test( form.email.value ) ) {
				alert( "Please enter a valid email address" );
				form.email.focus();
				return false;
			}
			else if (form.tel.value == "") {
				alert( "Please enter Your Telephone Number" );
				form.tel.focus();
				return false;
			}
			else if (form.country.value == "") {
				alert( "Please enter Your Country Name" );
				form.country.focus();
				return false;
			}
			else if (form.specialist.value == "") {
				alert( "Please enter Your Specialist Field" );
				form.specialist.focus();
				return false;
			}
			else if (form.topic.value == "") {
				alert( "Please enter Your Proposed Topic" );
				form.topic.focus();
				return false;
			}
			else 
			{			    
				form.submit();
			}
			 
				
				
		}