var TabImgLabelClass={
    currentNumber:0,
    
    border1:"images/tab/tab_border_1.gif",  //第一个tab被选中时，上侧边框
    border2:"images/tab/tab_border_2.gif",  //非最后一个tab被选中时，下侧边框
    border3:"images/tab/tab_border_3.gif",  //非第一个tab未被选中时，下侧或上侧边框
    border4:"images/tab/tab_border_4.gif",  //非第一个tab被选中时，上侧边框
    border5:"images/tab/tab_border_5.gif",  //最后一个tab未被选中时，下侧边框
    border6:"images/tab/tab_border_6.gif",  //最后一个tab被选中时，下侧边框
    border7:"images/tab/tab_border_7.gif",  //第一个tab未被选中时，上侧边框
    labelSuffix:"images/tab/tab_label",
    
    tabImgLabelClick:function(idNumber,pageUrl,targetObj){
        if(idNumber==this.currentNumber)return;
        
        var labelObjs=document.all.tabLabel;
        var borderObjs=document.all.tabBorder;
        if(idNumber==0){  //点击第一个
            if(labelObjs.length==1||labelObjs.length==undefined){    //只有一个
                
            }else{
                for(i=0;i<borderObjs.length;i++){
                    if(i==0){
                        borderObjs[i].src=this.border1;
                        labelObjs[i].src=this.labelSuffix+"_"+(i+1)+"_3.gif";
                    }else if(i==1){
                        borderObjs[i].src=this.border2;
                        labelObjs[i].src=this.labelSuffix+"_"+(i+1)+"_1.gif";
                    }else if(i!=borderObjs.length-1){
                        borderObjs[i].src=this.border3;
                        labelObjs[i].src=this.labelSuffix+"_"+(i+1)+"_1.gif";
                    }else{
                        borderObjs[i].src=this.border5;
                    }
                }
            }
        }else if(idNumber==labelObjs.length-1){  //点击最后一个
            for(i=0;i<borderObjs.length;i++){
                if(i==0){
                    borderObjs[i].src=this.border7;
                    labelObjs[i].src=this.labelSuffix+"_"+(i+1)+"_1.gif";
                }else if(i==borderObjs.length-2){
                    borderObjs[i].src=this.border4;
                    labelObjs[i].src=this.labelSuffix+"_"+(i+1)+"_3.gif";
                }else if(i==borderObjs.length-1){
                    borderObjs[i].src=this.border6;
                }else{
                    borderObjs[i].src=this.border3;
                    labelObjs[i].src=this.labelSuffix+"_"+(i+1)+"_1.gif";
                }      
            }
        }else{    //点击中间
            for(i=0;i<borderObjs.length;i++){
                if(i==0){
                    borderObjs[i].src=this.border7;
                    labelObjs[i].src=this.labelSuffix+"_"+(i+1)+"_1.gif";
                }else if(i<borderObjs.length-2){
                    if(idNumber==i){
                        borderObjs[i].src=this.border4;
                        labelObjs[i].src=this.labelSuffix+"_"+(i+1)+"_3.gif";
                    }else if((idNumber+1)==i){
                        borderObjs[i].src=this.border2;
                        labelObjs[i].src=this.labelSuffix+"_"+(i+1)+"_1.gif";
                    }else{
                        borderObjs[i].src=this.border3;
                        labelObjs[i].src=this.labelSuffix+"_"+(i+1)+"_1.gif";
                    }
                }else if(i==borderObjs.length-2){
                    if((idNumber+1)==i){
                        borderObjs[i].src=this.border2;
                    }else{
                        borderObjs[i].src=this.border3;
                    }
                    labelObjs[i].src=this.labelSuffix+"_"+(i+1)+"_1.gif";
                }else if(i==borderObjs.length-1){
                    borderObjs[i].src=this.border5;
                }
            }
        }
        this.currentNumber=idNumber;
        targetObj.action=pageUrl;
        targetObj.submit();
    }
};