function valid_form() 
    {
        if (emptyField(document.form1.txtname))
        {
            alert("Please Enter Name");
            document.form1.txtname.focus();
            return false;
        }
        if (emptyField(document.form1.txtemail)) {
            alert("Please Enter Email.");
            document.form1.txtemail.focus();
            return false;
        }
        if (!validEmailId(document.form1.txtemail.value)) {
            alert("Please Enter Valid Email Id.");
            document.form1.txtemail.focus();
            return false;
        }
        if (document.form1.selectwork.value == "Please Select") {
            alert("Please Select Work.");
            document.form1.selectwork.focus();
            return false;
        }
        if (emptyField(document.form1.txtworkdetail)) {
            alert("Please Enter Work Detail.");
            document.form1.txtworkdetail.focus();
            return false;
        }
       
       
    }