function $(str){ return document.getElementById(str);}

function loadImgBanner(url){
	var image = new Image();
	image.src=url;
	var imgObj=document.getElementById("subBanner");
	if (imgObj){
		imgObj.innerHTML="<img src=\""+url+"\" width=\"950\" height=\"144\" alt=\"\" />";
	}
}

function loadFunction(func){
	var oldfunction=window.onload;
	if(typeof oldfunction!="function"){
		window.onload=func;
	}
	else{
		window.onload=function(){
			oldfunction();
			func();
		}	
	}
}

//设置左右高度相等
function sameHeight(){
	var objLeft=document.getElementById("sidebar-bg");
	var objRight=document.getElementById("content-bg");
	if(!objLeft||!objRight) return false;
	var leftValue=parseInt(objLeft.offsetHeight);
	var rightValue=parseInt(objRight.offsetHeight);
	if(leftValue<rightValue){
		objLeft.style.height=rightValue+"px";
	}
	if(leftValue>rightValue){
		objRight.style.height=leftValue+"px";
	}
}


//弹窗居中
function openwindow(url,name,iWidth,iHeight){
	var url;                                 //转向网页的地址;
	var name;                           //网页名称，可为空;
	var iWidth;                          //弹出窗口的宽度;
	var iHeight;                        //弹出窗口的高度;
	var iTop = (window.screen.availHeight-30-iHeight)/2;       //获得窗口的垂直位置;
	var iLeft = (window.screen.availWidth-10-iWidth)/2;           //获得窗口的水平位置;
	window.open(url,name,'height='+iHeight+',,innerHeight='+iHeight+',width='+iWidth+',innerWidth='+iWidth+',top='+iTop+',left='+iLeft+',toolbar=no,menubar=no,scrollbars=yes,resizeable=no,location=no,status=no');
}

loadFunction(sameHeight);