Ограничение ширины изображений

// returns the HTML-formatted string with images which width
// is bigger, than the max value, specified, replaced with
// <а href="to full image"><img width='maxwidth' height='proportional' src='to full image' /></а>
// the smaller images are left unchanged
function smallDownImages( input, maxImageWidth )
 // searching for images in the source
 var inputLeft = input;
 var output = "";
 while ( true )
 {
 // searching for the img tag start
 var leftI = inputLeft.search( /<img[^>] >/mi );
 // checking, if there is something to do
 if ( leftI < 0 )
 {
 output = inputLeft;
 break;
 };
 
 // adding the part before the image to the output
 if ( leftI > 0 )
 output = inputLeft.slice( 0, leftI-1 );
 
 // the part of the input, untreated is:
 inputLeft = inputLeft.slice( leftI );
 
 // searching for the end of the image
 var rightI = inputLeft.search( />/mi );
 // checking, if there is a error in tags
 if ( rightI < 0 )
 {
 output = inputLeft;
 break;
 };
 
 // obtaining the image tag properties
 var imageTag = inputLeft.slice( 0, rightI 1 );
 var width = parseInt( imageTag.match( /width\s*=\s*[\'\"](\d )/mi )[1] );
 var height = parseInt( imageTag.match( /height\s*=\s*[\'\"](\d )/mi )[1] );
 var src = imageTag.match( /src\s*=\s*[\'\"]([^\'\"] )/mi )[1];
 // scaling, if required
 if ( width > maxImageWidth )
 {
 var scale = 0.5 maxImageWidth / width - 0.5;
 width = Math.floor( scale * width 0.5 );
 height = Math.floor( scale * height 0.5 );
 var imageTag = "<a href=\"" src "\">" 
 imageTag.replace( /(width\s*=\s*[\'\"])(\d )/mi, "$1" width )
 .replace( /(height\s*=\s*[\'\"])(\d )/mi, "$1" height ) 
 "";
 };
 // and adding to the output
 output = imageTag;
 
 // the part of the input, untreated is:
 inputLeft = inputLeft.slice( rightI 1 );
 };
 
 // done
 return output;
}