function check(form) {
	set = ",;'\"><|[]+=)(*&^%$#!~?/\\";
	
	for (i = 0; i < form.elements.length; i++) {
		if (form.elements[i].type == "text" 
		|| form.elements[i].type == "password" 
		|| form.elements[i].type == "textarea") {
			str = form.elements[i].value;
			for (j = 0 ; j < str.length; j++) {
				c = str.substring(j,j + 1);
			
				if (set.indexOf(c) >= 0) {
					alert("您输入了无效字符，请重新输入");
					form.elements[i].focus();
					return 0;
				}
			}
		}
	}
	
	return 1;
}

function validate(form) {
	if (check(form) == 0) {
		return false;
	}

	return true;
}