If you're looking to accomplish this task, one effective method is by utilizing the Google JSON API approach outlined in this guide.
Begin by incorporating a javascript file into your webpage similar to the example provided below.
<script src="http://spreadsheets.google.com/feeds/list/*ID*/*WS*/public/values?alt=json-in-script&callback=*FN*"></script>
• Replace *ID* with the lengthy ID of the spreadsheet.
• Replace *WS* with the worksheet number (e.g., 1, 2, 3, etc).
• Insert your desired function as *FN*.
In the specified callback function, consider using a structure like the one shown below to integrate your variable accordingly. The rowWithURL signifies the row index, while CellWIthURL typically represents the column header. Alternatively, other methods can be employed to pinpoint the URL location.
function CallBack(json){
entry = json.feed.entry[rowWithURL];
url = entry.gsx$CellWithURL.$t;
content = '<center>' +
'<form method="link" action='+ url +'>' +
'<input type="submit" value="Clickable Button">' +
'</form>' +
'</center>'
}
Kindly note that the above implementation has not been tested but should set you on the right path towards achieving your goal.