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 First Name");
		document.form1.name.focus();
		return false;
		}
		
		if(document.form1.phone.value=="")
		{
		alert("Please enter your phone");
		document.form1.phone.focus();
		return false;
		} 
		/*else if(isNaN(document.form1.phone.value))
		{
		alert("Please enter Number only");
		document.form1.phone.focus();
		return false;
		}*/
		
	  if(document.form1.email.value=="")
		{
		alert("Please enter 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;
		}
 
    return true;
   }