function openWindow(url) {
	popupWin = window.open(url,'new_page','width=400,height=400')
}
function openWindow2(url) {
	popupWin = window.open(url,'new_page','width=400,height=450')
}
function openWindow3(url) {
	popupWin = window.open(url,'new_page','width=400,height=450,scrollbars=yes')
}
function openWindow4(url) {
	popupWin = window.open(url,'new_page','width=400,height=525')
}
function openWindow5(url) {
	popupWin = window.open(url,'new_page','width=450,height=525,scrollbars=yes,toolbars=yes,menubar=yes,resizable=yes')
}
function openWindow6(url) {
	popupWin = window.open(url,'new_page','width=500,height=450,scrollbars=yes')
}
function openWindowHelp(url) {
	popupWin = window.open(url,'new_page','width=470,height=200,scrollbars=yes')
}

function insert(){
	document.getElementById("xxx").innerHTML="<input type=file name=attachment size=50 onkeydown='return false' onpaste='return false'>"; 
	document.getElementById("blnchange").value="changed"; 
}



function $(id) {
	return !id ? null : document.getElementById(id);
}

function resizeimg(width){
	var imgObj;
	for(i = 0; i < document.all.length; i++){
		if(document.all(i).tagName.toLowerCase()=="img"){
   			imgObj = document.all(i);	//建议只判断高度或者宽度其中一个，那样可以自动按比例缩放
    			if (imgObj.width>width)	//判断图片的宽度，如果大于700，则设置为700，值可以自己修改
   			{
    				imgObj.width=width;
   			}
		}
	} 
}

function runCode(obj) {
	var winname = window.open('', "_blank", '');
	winname.document.open('text/html', 'replace');
	winname.opener = null // 防止代码对论谈页面修改
	winname.document.write(obj.value);
	winname.document.close();
}