function SetImg(obj,maxW,maxH,OWidth,OHeight){var imgH,imgW;if(OHeight)imgH=OHeight;else imgH=obj.height;if(OWidth)imgW=OWidth;else imgW=obj.width;if(imgH>=maxH&&maxH*imgW/imgH<=maxW)
{obj.height=maxH;obj.width=(imgW*(maxH/imgH));}else if(imgW>=maxW&&maxW*imgH/imgW<=maxH)
{obj.width=maxW;obj.height=(imgH*(maxW/imgW));}else if(OHeight&&OWidth)
{obj.width=OWidth;obj.height=OHeight;}
if(obj.style.cssFloat)
{obj.style.cssFloat='left';}
else
{obj.style.styleFloat='left';}
obj.style.marginTop=(maxH-obj.height)/2+'px';obj.style.marginLeft=(maxW-obj.width)/2+'px';}
function tabbtn(i,num,page,class1,class2){for(var j=0;j<num;j++){var btn_title=document.getElementById('btn_title_'+j);var btn_main=document.getElementById('btn_main_'+j);if(j==i){if(class2)
btn_title.className=class2;btn_main.style.display='';}else{if(class1)
btn_title.className=class1;btn_main.style.display='none';}}
if(page=='index'&&(i==0||i==1||i==2)){for(var j=i*6;j<i*6+6;j++){var btn_img=document.getElementById('btn_img_'+j);SetImg(btn_img,85,85);}}}