function mm_jumpmenu(targ,selobj,restore){ //v3.0
  eval(targ+".location='"+selobj.options[selobj.selectedindex].value+"'");
  if (restore) selobj.selectedindex=0;
}


function showpic(mod){
       document.getelementbyid('spic').src=mod;}

//onmouseover="this.style.filter='alpha(opacity=100)';high(this)"  onmouseout="low(this)" onload="autoresizeimage(150,130,this)"
//闪图效果
function trains(id,text){document.all[id].innerhtml=' '+text}
function trainpic(id,text){document.all[id].innerhtml='<img src="'+text+'.gif">'}
function high(which2){
theobject=which2;theobject.filters.alpha.opacity=0
highlighting=setinterval("highlightit(theobject)",50)}
function low(which2){
clearinterval(highlighting)
which2.filters.alpha.opacity=100}
function highlightit(cur2){
if (cur2.filters.alpha.opacity<100)
cur2.filters.alpha.opacity+=15
else if(window.highting)
clearinterval(highlighting)}

					  
//等比例缩放图片
function autoresizeimage(maxwidth,maxheight,objimg){
var img = new image();
img.src = objimg.src;
var hratio;
var wratio;
var ratio = 1;
var w = img.width;
var h = img.height;
wratio = maxwidth/w;
hratio = maxheight/h;
if (maxwidth ==0 && maxheight==0){
ratio = 1;
}else if (maxwidth==0){//
if (hratio<1) ratio = hratio;
}else if (maxheight==0){
if (wratio<1) ratio = wratio;
}else if (wratio<1 || hratio<1){
ratio = (wratio<=hratio?wratio:hratio);
}
if (ratio<1){
w = w * ratio;
h = h * ratio;
}
objimg.height = h;
objimg.width = w;
}