Required library edition:
Required library file: dhtmlxwindows.js

sets user-defined viewport if enableAutoViewport(false)

• x - top-left viewport corner's X-coordinate
• y - top-left viewport corner's Y-coordinate
• width - viewport's width
• height - viewport's height
• parentObj - create inside of parentObj object

    dhxWins.setViewport(x, y, width, height, parentObj);