javascript - Many draggable images freely in the screen -

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i'm trying build page me , team can position images freely on screen. problem can't figure out way make images draggable. tried figure out myself , came upon nice topic it: html5 drag , drop move div anywhere on screen?

i've tried apply idea page , replace "getelementsbyid" "getelementsbyclassname" no dice.

in addition, twice nice if draggable image respect responsiveness of page, if knows how that.

here codepen attempt: http://codepen.io/guiharrison/pen/eshyr

thanks!

well, made up, it's kinda buggy, can play around it.

<html> <head>     <style>         #mydiv{         width: 100px;         height: 100px;         border: solid black 1px;         position: absolute;         }     </style>  </head> <body>     <div id="mydiv" onmousedown="ismousedown(1)" onmouseup="ismousedown(0)" onmousemove="mousemove(event)"></div>     <script>         var mousedown = false;         function ismousedown(tf){             if(tf == 1){             mousedown = true;             }             else{                 mousedown = false;             }         }         function mousemove(event){             if(mousedown){                 document.getelementbyid("mydiv").style.left=event.pagex;                 document.getelementbyid("mydiv").style.top=event.pagey;             }         }     </script> </body>


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