// JavaScript Document
 function $(object){return document.getElementById(object);}
 function setTab(num){
    imgs=$('tabMenu').getElementsByTagName('img');
     for(var i=0;i<imgs.length;i++)
	   {
	     imgs[i].src="Img_pic/tabImg"+(i+1)+".jpg";
		 var contnum='tabContent'+(i+1);
		 $(contnum).style.display="none";
	   }
	  imgs[num-1].src='Img_pic/tabImg'+num+'_1.jpg';
	  $('tabContent'+num).style.display='block';
  }