//获取对象 
function getObject(objectId,top) 
{ 
doc = top?window.top.document:document; 
if(typeof(objectId)!="object" && typeof(objectId)!="function") 
{ 
if(doc.getElementById && doc.getElementById(objectId)) 
{ 
// W3C DOM 
return doc.getElementById(objectId); 
} 
else if(doc.getElementsByName(objectId)) 
{ 
return doc.getElementsByName(objectId)[0]; 
} 
else if (doc.all && doc.all(objectId)) 
{ 
// MSIE 4 DOM 
return doc.all(objectId); 
} 
else if (doc.layers && doc.layers[objectId]) 
{ 
// NN 4 DOM.. note: this won't find nested layers 
return doc.layers[objectId]; 
} 
else 
{ 
return false; 
} 
}else 
return objectId; 
} 
//获取相对路径 
function getRelativePath() 
{ 
var url = location.href;//当前url 
var urlcs = String(location.search); 
url = url.replace(urlcs,""); 
var path = url.length - url.replace(/\//g,"").length - 3; //层次为url包含/的长度-没有包含/的长度再减去项目头/的个数 
var str = ""; 
for(var i = 0; i < path; i++) 
{ 
str += "../";//组合成一个相对路径的字符串返回 
} 
return str; 
} 
//加载其他JS文件或CSS文件 
function loadjscssfile(filename,filetype,chkonce) 
{ 
filetype = !filetype?"js":filetype; 
var had = false; 
if(filetype=="js") 
{ 
if(chkonce) 
{ 
var allScripts = document.getElementsByTagName("script"); 
for(var i=0;i{ 
try{ 
if(allScripts[i].src.indexOf(filename)>-1) 
{ 
had = true; 
break; 
} 
}catch(e){} 
} 
} 
if(!had) 
{ 
document.write("