var maskingTarget = null;

function imgmask_init( id ) {
	maskingTarget = ( document.getElementById( id ) || document.getElementsByName( id )[0] );
	if( !maskingTarget ) return;

	maskingTarget.style.float = 'left';
	maskingTarget.style.position = 'relative';
}

function prev( value ) {
    if( !maskingTarget ) return;
    if( !value ) value = 137;

   /* if($.browser.msie) {
        if(maskingTarget.offsetLeft >= 0 ) return;
        maskingTarget.style.left = (maskingTarget.offsetLeft + value +2 ) + 'px';
   } else {*/
        var left = parseInt(maskingTarget.style.left.replace('px', ''));
        if(isNaN(left) === true) left = 0;
        if(left >= 0 ) return;
        maskingTarget.style.left = (left + value +2 ) + 'px';
   //}
}

function next( value ) {
    if( !maskingTarget ) return;
    if( !value ) value = 137;

    /*if($.browser.msie) {
        if( ( maskingTarget.childNodes.item( maskingTarget.childNodes.length -1 ).offsetLeft + maskingTarget.offsetLeft ) < mask.offsetWidth ) return;
        maskingTarget.style.left = ( maskingTarget.offsetLeft - value -2 ) + 'px';
    } else {*/
        var left = parseInt(maskingTarget.style.left.replace('px', ''));
        if(isNaN(left) === true) left = 0;
        //if( ($(maskingTarget).children().eq($(maskingTarget).children().size()-1).get(0).offsetLeft+left) < mask.offsetWidth ) return;
        maskingTarget.style.left = ( left - value - 2 ) + 'px';
    //}
}