function $(obj){return document.getElementById(obj);}
function setImgSize(imgID,maxWidth,maxHeight){
	var img = document.images[imgID];
	if(maxWidth < 1){
		if(img.height > maxHeight) {
			img.height = maxHeight;
		}
		return true;
	}
	if(maxHeight < 1){
		if(img.width > maxWidth){
			img.width = maxWidth;
		}
		return true;
	}
	if(img.height > maxHeight || img.width > maxWidth){
		if((img.height / maxHeight) > (img.width / maxWidth)){
			img.height = maxHeight;
		}else{
			img.width = maxWidth;
		}
		return true;
	}
}
//refresh validCode
function resetValidCode() {
	var ValidFile = "validCode.asp";
	if($("validCode"))
		$("validCode").innerHTML = '<img src="'+ValidFile+'?t='+Math.random()+'" alt="刷新？" style="cursor:pointer;vertical-align:middle;" onclick="this.src=\''+ValidFile+'?t=\'+Math.random()" />'
}



function chk_gb_form(obj) {
	var form_obj = obj;
	var patrn=/^[a-zA-Z0-9_\-]{1,}@[a-zA-Z0-9_\-]{1,}\.[a-zA-Z0-9_\-.]{1,}$/;
	if (form_obj.gb_title.value == "" ) {
		alert("错误：\n\n请填写相关数据");
		form_obj.gb_title.select();
		return false;
	}	
	if (form_obj.gb_user_name.value == "" ) {
		alert("错误：\n\n请填写相关数据");
		form_obj.gb_user_name.select();
		return false;
	}	
//	if (form_obj.gb_user_email.value == "" ) {
//		alert("错误：\n\n请填写相关数据");
//		form_obj.gb_user_email.select();
//		return false;
//	}	

	if (form_obj.gb_user_email.value != "" ) {
		if (!patrn.exec(form_obj.gb_user_email.value)){
			alert("错误：\n\n 格式错误");
			form_obj.gb_user_email.select()
			return false;
		}	
	}
	if (form_obj.gb_user_form.value == "" ) {
		alert("错误：\n\n请填写相关数据");
		form_obj.gb_user_form.select();
		return false;
	}	
//	if (form_obj.gb_user_phone.value == "" ) {
//		alert("错误：\n\n请填写相关数据");
//		form_obj.gb_user_phone.select();
//		return false;
//	}	
	if (form_obj.gb_user_content.value == "" ) {
		alert("错误：\n\n请填写相关数据");
		form_obj.gb_user_content.select()
		return false;
	}
	if (form_obj.gb_code.value == "" ) {
		alert("错误：\n\n请填写相关数据");
		form_obj.gb_code.select()
		return false;
	}
}