function MainLinkBg(flag)
{
	
	var link1=document.getElementById(flag);

	var mylink=new Array();
	mylink[0]="index";
	mylink[1]="introduce1";
	mylink[2]="product1";
	mylink[3]="cases1";
	mylink[4]="support1";
	mylink[5]="channel";

	for(i=0;i<mylink.length;i++)
	{
		if(flag==mylink[i])
		{
			link1.className="aMain in";
		}
		//else
//		{
//			link1.className="aMain";	
//		}
	}

}


function LeftLinkBg(flag2)
{
	var link2=document.getElementById(flag2);
	
	var mylink2=new Array();
	mylink2[0]="Plan";
	mylink2[1]="Online";
	mylink2[2]="Training";
	mylink2[3]="Artical";
	mylink2[4]="Marketing";

	for(i=0;i<mylink2.length;i++)
	{	
		if(flag2==mylink2[i])
		{
			link2.className="blue_box";
		}
	}

}