CODEWITHSUNDEEP
javascriptjquerycsspositioncoordinates
PartySoft
PartySoft

Reputation: 2839

css: <img> position with given coords x,y on top of another image (using jquery)

I have the following problem and I'm pretty bad at CSS, but good at Javascript and Jquery I have a map (JPG size 579x527) and some coordinates points that represent some points on the map can be represented with a simple circle icon

I must put those points with some links as layers on top of the image map I thought that by doing margin -X and then puting left:X will solve the problem but it's not like that Here's my code so far (I'm generating the coords randomly with 20 points)

function randomFromTo(from, to){
       return Math.floor(Math.random() * (to - from + 1) + from);
    }

jQuery(document).ready(function () { 
var tmp;
var x;
var y;
var x_margin;
var y_margin;

for(var i=0;i<=20;i++) {
tmp=jQuery('#img_map').html(); //the map itself



x=randomFromTo(10,500);
y=randomFromTo(10,500);

jQuery('#img_map').html(tmp+'<a href="#" style="display:block;position:relative;margin-left:-'+x+'px; margin-top:-'+y+'px;left:'+x+'px; top:'+y+'px; "><img src="icon_point.png" border="0" width="20" height="20"></a>');

}

});

The code doesn't work ...it shows wierd the points..

Upvotes: 2

Views: 8498

Answers (2)

Kimtho6
Kimtho6

Reputation: 6184

Use position:absolute; left:250px; top:250px; instead of margin

jQuery('#img_map').html(tmp+'<a href="#" style="display:block;position:absolute;left:-'+x+'px; top:-'+y+'px;"><img src="icon_point.png" border="0" width="20" height="20"></a>');

and the parent element needs to have position:relative;

Upvotes: 3

Samich
Samich

Reputation: 30185

Use relative positioning inside the map. Here is sample:

html

<div id="img_map"></div>

css

#img_map { background:red; position:relative; width:500px; height:500px; }
.point { display:block; background:green; width:20px; height:20px; position:absolute; }

script

function randomFromTo(from, to){
   return Math.floor(Math.random() * (to - from + 1) + from);
}

jQuery(document).ready(function () { 
    var $map = jQuery('#img_map');
    for(var i=0;i<=20;i++) {

        var x = randomFromTo(10,500);
        var y = randomFromTo(10,500);

        var $point = jQuery('<a href="#" class="point"><img src="icon_point.png" /></a>').css({top:y + 'px', left:x + 'px'});
        $map.append($point); 

    }
});

Working sample: http://jsfiddle.net/8yqpy/11/

Upvotes: 1

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