Question

I’ve been tasked with rewriting the Javascript engine currently powering my customer’s internal website. While reviewing the code I’ve come across this function flvFPW1 which I do not recognize, nor can I decipher the code(my Javascript knowledge is modest at best). A Google search gives me a few hits, but most if not all page hits are from the Javascript used on that particular page. In other words, I cannot find a description for this function, even though it is obviously used by others.

Can someone here enlighten me?

Thanks / Fredrik

Answer 1

My own research agrees that it’s a dreamweaver extension: I found code for version 1.44 (scroll down some on this page) rather than 1.3:

function flvFPW1(){//v1.44 var v1=arguments,v2=v1[2].split(','),v3=(v1.length>3)?v1[3]:false,v4=(v1.length>4)?parseInt(v1[4]):0, v5=(v1.length>5)?parseInt(v1[5]):0,v6,v7=0,v8,v9,v10,v11,v12,v13,v14,v15,v16;v11= new Array('width,left,'+v4,'height,top,'+v5);for (i=0;i<v11.length;i++){v12=v11[i].split(',');l_iTarget=parseInt(v12[2]); if (l_iTarget>1||v1[2].indexOf('%')>-1){v13=eval('screen.'+v12[0]); for (v6=0;v6<v2.length;v6++){v10=v2[v6].split('='); if (v10[0]==v12[0]){v14=parseInt(v10[1]);if (v10[1].indexOf('%')>-1){v14=(v14/100)*v13;v2[v6]=v12[0]+'='+v14;}} if (v10[0]==v12[1]){v16=parseInt(v10[1]);v15=v6;}} if (l_iTarget==2){v7=(v13-v14)/2;v15=v2.length;} else if (l_iTarget==3){v7=v13-v14-v16;}v2[v15]=v12[1]+'='+v7;}}v8=v2.join(',');v9=window.open(v1[0],v1[1],v8); if (v3){v9.focus();}document.MM_returnValue=false;return v9;} 

Which was, of course, passed through a compressor to save bandwidth making it very hard to read. I spent a little bit of time un-obfuscating it before I realized that I could get better results by adding ‘dreamweaver’ to my search string. Doing that I was able to find some more interesting documentation:

http://www.flevooware.nl/dreamweaver/extdetails.asp?extID=8 (short description) http://satsuki.altervista.org/basibloggers/source40.txt (full script code, in italian)

In short: it’s basically just a wrapper for window.open. Here’s the progress I made translating the code:

function flvFPW1() {//v1.44     var v1=arguments;  // pass v1[0] and v1[1] directly to window.open     var arg3=v1[2].split(',');     var focusNewWindow=(v1.length>3)?v1[3]:false;     var newWindowWidth=(v1.length>4)?parseInt(v1[4]):0;     var newWindowHeight=(v1.length>5)?parseInt(v1[5]):0;      var adjustedWindowPosition=0,result,keyValuePair,AxisProperty;     var windowSize,sizeValue,arg3Index,anchorValue;      var hwArray= new Array('width,left,'+newWindowWidth,'height,top,'+newWindowHeight);     for (i=0;i<hwArray.length;i++)  // x-axis, then y-axis     {         AxisProperty=hwArray[i].split(','); // {'width', 'left', 0}  or {'height', 'top', 0}         l_iTarget=parseInt(AxisProperty[2]);  // l_iTarget defined where?          if (l_iTarget>1||v1[2].indexOf('%')>-1)           {             screenSize=eval('screen.'+AxisProperty[0]); // x or y size of the window             for (var i=0;i<arg3.length;i++)             {                 keyValuePair=arg3[i].split('=');                 if (keyValuePair[0]==AxisProperty[0]) // if the key is (width|height)                 {                     sizeValue=parseInt(keyValuePair[1]);                     if (keyValuePair[1].indexOf('%')>-1)                     {                         sizeValue=(sizeValue/100)* screenSize;                         arg3[i]=AxisProperty[0]+'='+sizeValue;                     }                 }                  if (keyValuePair[0]==AxisProperty[1])  // if the key is (left|top)                 {                     anchorValue=parseInt(keyValuePair[1]);                     arg3Index=i;                 }             }             if (l_iTarget==2)             {                 adjustedWindowPosition=(screenSize-sizeValue)/2; // will center the window on this axix                 arg3Index=arg3.length;             }             else if (l_iTarget==3)             {                 adjustedWindowPosition= screenSize-sizeValue-anchorValue;             }             arg3[arg3Index]=AxisProperty[1]+'='+adjustedWindowPosition;  // (left|top) = value         }     }     var newArg3=arg3.join(',');     result=window.open(v1[0],v1[1],newArg3);     if (focusNewWindow)     {         result.focus();     }      document.MM_returnValue=false;     return result; }