function checkMandatory(){
var flag = true;
var message = 'Please fill in all mandatory fields !';
if (document.checkFRM.field2.value.length==0){
flag = false;
};
if (document.checkFRM.field3.value.length==0){
flag = false;
};
if (document.checkFRM.field4.value.length==0){
flag = false;
};
if (flag == false) {
alert(message);
};
return flag;
};