js image load

image_load.js

if(isie){
		if($.browser.version==6.0){
			image.onreadystatechange = function () {
		        if (image.readyState == "complete"){
		        	dothing();
		        }
		    };
		}else{
			ie7imagetime = window.setInterval(function(){
				var rs = image.readyState;
				if(rs=="complete"){
					window.clearInterval(ie7imagetime);
					dothing();
				}else{
					return;
				}
			},200);
		}
	}else{
		image.onload = function () {
	        if (image.complete == true){
	             dothing();
	         }
	    };
	}