function submitform()
{
	strURL="crawl.php";
	var xmlHttpReq = false;
    var self = this;
    // Mozilla/Safari
    if (window.XMLHttpRequest)
	{
        self.xmlHttpReq = new XMLHttpRequest();
    }
    // IE
    else if (window.ActiveXObject)
	{
        self.xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
    }
    self.xmlHttpReq.open('POST', strURL, true);
    self.xmlHttpReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    self.xmlHttpReq.onreadystatechange = function()
	{
        if (self.xmlHttpReq.readyState == 4) 
		{
            updatepage(self.xmlHttpReq.responseText);
        }
    }
    self.xmlHttpReq.send(null);

}
function updatepage(str) 
{

	
	document.getElementById("result").innerHTML =str;
}