//function for validating empty field

function validateBlank(formName,fieldName,msg){
       var     doc = "document."
       var input = eval(doc+formName+"."+fieldName+".value");

       var lenth = input.length ;
       var ctr=0 ;

       if(input==""){
               alert(msg);
               eval(doc+formName+"."+fieldName+".focus()")
               return false;
       }

       return true
}

//function for Validating Email

function validateEmail(formName,fieldName,msg){

       var doc = "document."
       str=eval(doc+formName+"."+fieldName+".value");
       var
filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i
       if (filter.test(str)){return true}
       else
       {
               alert(msg)
               eval(doc+formName+"."+fieldName+".select()")
               return false
       }
}