function validate_user(){
	if(document.login.username.value==""){
		alert("Enter your email id");
		document.login.username.value="";
		document.login.username.focus();
		return false;
	}
	else if (echeck(document.login.username.value)==false){
		document.login.username.value="";
		document.login.username.focus();
		return false;
	}
	else if(document.login.passwd.value==""){
		alert("Enter password");
		document.login.passwd.value="";
		document.login.passwd.focus();
		return false;
	}
}