function trim(inputString) {
	if (typeof inputString != "string") { return inputString; }
	var retValue = inputString;
	var ch = retValue.substring(0, 1);
	while (ch == " ") {
		retValue = retValue.substring(1, retValue.length);
		ch = retValue.substring(0, 1);
	}
	ch = retValue.substring(retValue.length-1, retValue.length);
	while (ch == " ") {
		retValue = retValue.substring(0, retValue.length-1);
		ch = retValue.substring(retValue.length-1, retValue.length);
	}
	while (retValue.indexOf("  ") != -1) {
		retValue = retValue.substring(0, retValue.indexOf("  ")) + retValue.substring(retValue.indexOf("  ")+1, retValue.length);
	}
	return retValue;
}
function querykey() {
	var keyobj = document.getElementById("key");
	var key = trim(keyobj.value);
	if(key==""){
			return false;
	}
	return true;
}
function chkfeedbackform(){
	var contentobj = document.getElementById("content");
	var content = trim(contentobj.value);
	if(content==""){
			alert("请填写反馈内容");
			contentobj.focus();
			return false;
	}
	return true;
	}