ajax同步模式的浏览器兼容问题
upload.php
PHP code
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
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<script>
function GetXmlHttpObject()
{
var XMLHttp=null;
try
{
XMLHttp=new XMLHttpRequest();
}
catch(e)
{
try
{
XMLHttp=new ActiveXObject("Msxml2.XMLHTTP");
}
catch(e)
{
XMLHttp=new ActiveXObject("Microsoft.XMLHTTP");
}
}
return XMLHttp;
}
function upload()
{
var flag=false;
var XMLHttp=GetXmlHttpObject();
var url="upload_deal.php";
var dataStr="hour="+document.getElementById("hour").value;
XMLHttp.open("POST",url,false);
XMLHttp.setRequestHeader("content-type","application/x-www-form-urlencoded");
XMLHttp.send(dataStr);
var resTest=XMLHttp.responseText;
resTest=resTest.trim();
var response_compent="true";
if(resTest!=response_compent)
{
document.getElementById("status").innerHTML=resTest;
}
else
flag=true;
return flag;
}
</script>
后台upload_deal.php
PHP code
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if($_REQUEST['hour']==1)
{
echo "true";
}
else
{
echo "false";
}
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想实现将hour提交到后台判断,再根据返回值,true正确则提交表单、跳转,false错误则不提交表单、不跳转、给出提示。但是这个代码在firefox和谷歌等非ie内核的浏览器没有问题,但是使用ie(我这是9)就全部都跳转了。尝试加上回调函数的状态判断onreadystatechange,但是所有浏览器就都不执行了,一过onreadystatechange就直接到最后的return了。
PHP code
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XMLHttp.onreadystatechange=function()
{
if(XMLHttp.readyState==4&&XMLHttp.status==200)
{
var resTest=XMLHttp.responseText;
resTest=resTest.trim();
var response_compent="true";
if(resTest!=response_compent)
{
document.getElementById("status").innerHTML=resTest;
}
else
flag=true;
}
}
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------解决方案--------------------搜了搜,javascript没有trim()方法吧? resTest=resTest.trim();
------解决方案--------------------