function checkemail(){
 var str=document.contact.email.value
 var filter=/^.+@.+\..{2,3}$/

 if (filter.test(str))
    testresults=true
 else {
    testresults=false
}
 return (testresults)
}
 
function checkform(){
			 
		
			 
  		 if(document.contact.name.value ==""){
				alert("Please enter name");
				document.contact.name.focus();
				return false;
			
			}
			
			
			if(document.contact.email.value==""){
 		    alert("Please enter email address");
			document.contact.email.focus();
			return false;
		
			}
			
			if(checkemail(document.contact.email.value)==false){	
		     alert("Please enter valid email address");
		     document.contact.email.focus();
		      return false;
		
			}
		
			
			if(document.contact.phone.value==""){
			
				alert("Please enter phone number");
				document.contact.phone.focus();
				return false;
			
			}
		}