function validemail(email) {
   var mail = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
 
   if(mail.test(email) == false) {
          return false;
   }
}


function validate()
{
var r=document.form2;

if(r.name.value=="")
{
alert("Enter your name");
r.name.focus();
return false;     
}

if(r.address.value=="")
{
alert("Enter your address");
r.address.focus();
return false;     
}



if(r.post_code.value=="")
{
alert("Enter your postal code");
r.post_code.focus();
return false;     
}

if(r.phone.value=="")
{
alert("Enter your phone no");
r.phone.focus();
return false
}

if(r.mobile.value=="")
{
alert("Enter your mobile");
r.mobile.focus();
return false
}

if(r.email.value=="")
{
alert("Enter your email");
r.email.focus();
return false
}
if(r.email.value!="")
{
if(validemail(r.email.value)==false)
		   { 
		    alert("please enter valid  email");
			r.email.focus();
			return false;
		   
		   }  
}


if(r.fax.value=="")
{
alert("Enter your fax");
r.fax.focus();
return false
}

if(r.comments.value=="")
{
alert("Enter your comments");
r.comments.focus();
return false
}

if(r.about_us.value=="")
{
alert("How did you hear about us?");
r.about_us.focus();
return false
}

}