alert("Can't go back from index " + this.currentBackForwardIndex); 
console.error("Can't go back from index " + this.currentBackForwardIndex); 
WebInspector.back = function(){    if (this.currentBackForwardIndex <= 0) {        alert("Can't go back from index " + this.currentBackForwardIndex);        return;    }    this.navigateToPanel(this.backForwardList[--this.currentBackForwardIndex], null, true);}
1725	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/1725/11650fd39ffebe23630ae00304720f3195cfabd4/inspector.js/clean/WebCore/page/inspector/inspector.js