$(function onLoad(){
	imgResize("#proImg",485,300);
});
function onReadyImgLoad(){
	
}

/*图片等比例缩放*/
function imgResize(target,mWidth,mHeight){
	var oWidth = $(target).attr("width");
	var oHeight = $(target).attr("height");
	var oRate = oWidth/oHeight;
	//var mWidth = 320;
	//var mHeight = 300;
	var mRate = mWidth/mHeight;
	if(mRate>oRate){
		$(target).attr("width",mHeight*oRate);
		$(target).attr("height",mHeight);
	}else{

		$(target).attr("width",mWidth);
		$(target).attr("height",mWidth/oRate);
	}

}