JavaScript Simple Image Loader

image.js

function load_image_profile(url, to, w, h){
    if(!url || !to) return;
    
    var img = new Image();
    
    img.onload = function(){
        var scope = $(to);
        var max_h = h || 176, 
            max_w = w || 176, 
            ratio = this.height/this.width;
        
        if(this.width > max_w) {
            this.width = max_w;
            this.height = Math.round(this.width*ratio);
            
            if(this.height < max_h){
                this.height = max_h;
                this.width = Math.round(this.height/ratio);
            
            }
            
        } else if(this.height > max_h) {
            this.height = max_h;
            this.width = Math.round(this.height/ratio);
            
            if(this.width < max_w){
                this.width = max_w;
                this.height = Math.round(this.width*ratio);
                
            }
            
        } 
        
        if(scope.children().length>1){
            scope.children().remove(':first');
        } 
        
        scope.prepend(this);
    }
    
    img.src = url;
}