//关于产品的层背景颜色和层内响应图片变换
function changeDivStyle(id,color) {
 	var cns,agent,version,pos;
 	var o = document.getElementById(id);
	agent = navigator.userAgent;
	pos = agent.indexOf('MSIE');
	if( pos != -1) {
		version = parseFloat(agent.substr(pos+5,3));
		if(version < 7) {
			return;
		}
	}
	o.style.backgroundColor = color;
 }
var gagent = navigator.userAgent;
var gpos = gagent.indexOf('MSIE');
if( gpos != -1) {
	gversion = parseFloat(gagent.substr(gpos+5,3));
	if(gversion < 7) {
		var imgarr = ['TdbImg1','TdbImg2','TdbImg3','TdbImg4'];
		var arrLength = imgarr.length;
		for(var i=0;i<arrLength;i++) {
			img = document.getElementById(imgarr[i]);
			img.src = img.src.substring(0,img.src.lastIndexOf('.')) + '.jpg';
		}
	}
}