function showhidediv(id,openclose){
try{
if(document.getElementById(id)){
if(document.getElementById(id).style.display=='none'){
	document.getElementById(id).style.display='block';
	openclose.className="upArrow"
}else{
	document.getElementById(id).style.display='none';
	openclose.className="downArrow"
}
}
}catch(e){}
} 

//运行代码
function runEx(cod1)  {
	 cod=document.getElementById(cod1)
	  var code=cod.value;
	  if (code!=""){
		  var newwin=window.open('','','');  
		  newwin.opener = null 
		  newwin.document.write(code);  
		  newwin.document.close();
	}
}

//另存代码
function doSave(obj) {
	var winname = window.open('', '_blank', 'top=10000');
	winname.document.open('text/html', 'replace');
	winname.document.writeln(obj.value);
	winname.document.execCommand('saveas','','code.htm');
	winname.close();
}

//返回顶部
//<![CDATA[
var goto_top_type = -1;
var goto_top_itv = 0;

function goto_top_timer()
{
var y = goto_top_type == 1 ? document.documentElement.scrollTop : document.body.scrollTop;
var moveby = 15;

y -= Math.ceil(y * moveby / 100);
if (y < 0) {
y = 0;
}

if (goto_top_type == 1) {
document.documentElement.scrollTop = y;
}
else {
document.body.scrollTop = y;
}

if (y == 0) {
clearInterval(goto_top_itv);
goto_top_itv = 0;
}
}

function goto_top()
{
if (goto_top_itv == 0) {
if (document.documentElement && document.documentElement.scrollTop) {
goto_top_type = 1;
}
else if (document.body && document.body.scrollTop) {
goto_top_type = 2;
}
else {
goto_top_type = 0;
}

if (goto_top_type > 0) {
goto_top_itv = setInterval('goto_top_timer()', 50);
}
}
}
//]]>