function validate(){
	if(document.SampleForm.PField_0.value == ""){
		alert("Please enter your Email Id");
		document.SampleForm.PField_0.focus();
		return false;
	}
	if (!(document.SampleForm.PField_0.value.match((/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/)))){
	alert("please enter valid Email Id");
	document.SampleForm.PField_0.focus();
	return false;
	}
}