function validateEmail(form1){      
       var emailPattern = /^[a-zA-Z0-9._-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}$/;
       return emailPattern.test(form1); 
   }
   function chkform(form1)
   {
		if(document.form1.name.value=="")
		{
		alert("Please enter your Name");
		document.form1.name.focus();
		return false;
		}
		
		if ( ( document.form1.gender[0].checked == false ) && ( document.form1.gender[1].checked == false ) ) { alert ( "Please choose your Gender: Male or Female" ); return false; }
		
		if(document.form1.date.value=="")
		{
		alert("Please select the date");
		document.form1.date.focus();
		return false;
		}
		
		if(document.form1.month.value=="")
		{
		alert("Please select the month");
		document.form1.month.focus();
		return false;
		}
			
		if(document.form1.year.value=="")
		{
		alert("Please select the year");
		document.form1.year.focus();
		return false;
		}
		
		if ( ( document.form1.smoker[0].checked == false ) && ( document.form1.smoker[1].checked == false ) ) { alert ( "Please choose your Smoker: Yes or No" ); return false; }

		if ( (document.form1.phone1.value=="") || (document.form1.phone2.value=="") || (document.form1.phone3.value =="") ) { 
		alert ( "Please enter correct phone number" ); 
		document.form1.phone1.focus();
		return false; }
		
		if(document.form1.email.value=="")
		{
		alert("Please enter correct email address");
		document.form1.email.focus();
		return false;
		}
		
		if(!validateEmail(document.form1.email.value))
		{
		alert("Please enter correct email address");
		document.form1.email.focus();
		return false;
		}
		
		if(document.form1.email.value!=document.form1.email1.value)
		{
		alert("Please confirm your email correctly");
		document.form1.email1.focus();
		return false;
		}
						
		
    return true;
   }