使用Javascript进行错误定位

使用Javascript进行错误位置定位，示例代码如下：

 

<script>
window.onerror = function(sMessage,sUrl,sLine){
	var str = "";
	str += " 错误信息:" + sMessage + "\n";
	str += " 错误地址:" + sUrl + "\n";
	str += " 错误行数:" + sLine + "\n";
	str += "<=========调用堆栈=========>\n";
	var func = window.onerror.caller;
	var index = 0;
	while(func!=null){
		str += "第" + index + "个函数：" + func + "\n";
		str += "第" + index + "个函数：参数表："
		for(var i=0;i<func.arguments.length;i++){
			str += func.arguments[i] + ",";
		}
		str += "\n===================\n";
		func = func.caller;
		index++;
	}
	alert(str);
}
function test(){
	test1("a","b");
}
function test1(a,b){
	alert(ab);
}
test();
</script>