var modal = document.getElementById('myModal'); // Get the button that opens the modal var btn = document.getElementById("myBtn"); // Get the  element that closes the modal var span = document.getElementsByClassName("close")[0]; // When the user clicks on the button, open the modal btn.onclick = function() { modal.style.display = "block"; } // When the user clicks on  (x), close the modal span.onclick = function() { modal.style.display = "none"; } // When the user clicks anywhere outside of the modal, close it window.onclick = function(event) { if (event.target == modal) { modal.style.display = "none"; } } 

 .modal { display: none; /* Hidden by default */ position: fixed; /* Stay in place */ z-index: 1; /* Sit on top */ left: 0; top: 0; width: 100%; /* Full width */ height: 100%; /* Full height */ overflow: auto; /* Enable scroll if needed */ background-color: rgb(0,0,0); /* Fallback color */ background-color: rgba(0,0,0,0.4); /* Black w/ opacity */ } /* Modal Content/Box */ .modal-content { background-color: #fefefe; margin: 15% auto; /* 15% from the top and centered */ padding: 20px; border: 1px solid #888; width: 80%; /* Could be more or less, depending on screen size */ } /* The Close Button */ .close { color: #aaa; float: right; font-size: 28px; font-weight: bold; } .close:hover, .close:focus { color: black; text-decoration: none; cursor: pointer; } 

 Open Modal  
  
 × 
Some text in the Modal..
 
  

    
 Click Me to open modal 
 
 
 × 
Some text. Some text. Some text.
 
Some text. Some text. Some text.
 
 
 
 
  

 $('#myBtn').click(function(){ $('.modal-content').show(); $('body').toggleClass('modalbackground'); }); $('.modal-content .close').click(function(){ $('.modal-content').hide(); $('body').toggleClass('modalbackground'); }); 

 .modal-content { display: none; position: fixed; } .modalbackground { width: 100%; height: 100%; background: rgba(0,0,0,0.25); z-index: 1; } .modal-content { width: 33.333%; top: 20%; left: 33.3333%; background: white; z-index: 2; } .close{ cursor: pointer; } 

  Open Modal 
 × 
Some text in the Modal..
  

 function createModal(){ var dataModal = ""; var countModal = $(".modalWrap").length; if(typeof countModal === "undefined" || countModal == 0){ countModal = 0; } /*this just an example, you can try improv it more like load file or url to fill your modal data.*/ dataModal = '
 
This Modal '+(countModal+1)+'
 
'; $('body').append(dataModal); } function closeModal(idModal){ $(idModal).remove(); } 

 .modalWrap{ width : 100%; background : rgba(0,0,0,0.5); min-height : 500px; position : fixed; top:0; left:0; } .modalBody{ width : 60%; min-height: 250px; background : #fff; margin-top : 10%; }